Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Does anyone know if Cinemax will be going to Roku ever? It seems to be the last one of the cable channels that I can stream for free with a cable subscription that isn't on Roku's lineup. And it's odd because it is owned by HBO which was one of the first cable channels to stream to Roku.
Another option is to use PlayOn. They have a MaxGO channel you can use to access Cinemax through your Roku. I just did tonight to watch the exceptional film, "The Book of Henry". You may need to pay for a license for PlayOn, which I have got the Lifetime license. PlayOn, like PLEX, utilizes your computer to access content. This is a legal way to access Cinemax, as you still need your login credentials to access content. Hope this is helpful.